MSGGUID &1: Control record must start with tag EDI_DC40, not &2

What causes this issue?

MSGGUID &: Control record must start with <EDI_DC40 segment="1"> and
not &.

System Response

The XML format does not correspond with the schema of the XML IDoc.

How to fix this error?

Check whether the XML format corresponds to a schema of an XML IDoc in
the Integration Repository.
Use transaction WE60 in an SAP system to also look at the DTD belonging
to an IDoc type.

Procedure for System Administrators

Contact your system administrator.

Error message extract from SAP system. Copyright SAP SE.